Facile synthesis of yolk-shell structured SiOx/C@Void@C nanospheres as anode for lithium-ion batteries

被引：30

作者：

Wang, Haoqiang ^{[1
,2
]}

Que, Xiaoqi ^{[1
,2
]}

Liu, Yani ^{[1
,2
]}

Wu, Xingxing ^{[1
,2
]}

Yuan, Qunhui ^{[1
,2
]}

Lu, Jingyu ^{[1
,3
,4
]}

Gan, Wei ^{[1
,3
,4
]}

机构：

[1] Harbin Inst Technol Shenzhen, Flexible Printed Elect Technol Ctr, Shenzhen 518055, Peoples R China

[2] Harbin Inst Technol Shenzhen, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China

[3] Harbin Inst Technol Shenzhen, State Key Lab Adv Welding & Joining, Shenzhen 518055, Peoples R China

[4] Harbin Inst Technol Shenzhen, Sch Sci, Shenzhen 518055, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 874卷

关键词：

Silicon oxide; Yolk-shell structured nanosphere; Template mediated strategy; Anode material; Lithium-ion battery; HIGH-PERFORMANCE ANODE; HIGH-CAPACITY; DOPED CARBON; COMPOSITE; GRAPHENE; NITROGEN; NANOCOMPOSITE; MICROSPHERES; EFFICIENT; LAYER;

D O I：

10.1016/j.jallcom.2021.159913

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Silicon oxide (SiOx) is an attractive anode material for lithium-ion battery due to its high specific capacity and low working potential. However, its scale utilization confronts with low electrical conductivity and large volume expansion. Herein, a yolk-shell structured N, S co-doped SiOx/C@void@C nanosphere is fabricated through a one-pot organosilica template mediated strategy. The co-doping of N, S enables SiOx/C@void@C with good conductivity, increased lithium storage capacity and improved interfacial contact. The hollow void between SiOx/C core and carbon shell effectively buffers the large volume change during the cycling. Consequently, the yolk-shell SiOx/C@void@C structures exhibit excellent electrochemical performance, with a high discharge specific capacity of 879 mAh.g(-1) after 100 cycles at 0.1 A.g(-1), outstanding rate capability of 464 mAh.g(-1) at 5 A.g(-1) and excellent cycling stability of 584 mAh.g(-1) after 500 cycles at 1.0 A.g(-1). (C) 2021 Published by Elsevier B.V.

引用

页数：7

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